EEZ H24005 Power Supply

A fully open source programmable power supply with professional, lab-quality features and performance

Jul 11, 2019

Project update 20 of 20

The H24005 is Dead, Long Live the BB3!

Hi everyone,

After nearly two years on pause, we’d like to announce that we’ve given up on plans to continue production of the EEZ H24005. But we have not been on holiday! As some of you who contacted us already know, we’ve spent many hours trying to push the H24005 concept to the next level by addressing known issues and adding new features. From this effort was born EEZ Bench Box 3 (BB3)!

*The BB3 campaign will feature early-bird pricing.
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BB3 addresses the following issues that we identified in the H24005:

Main differences between BB3 and H24005

FeatureEEZ BB3EEZ H24005
Backplane for Peripheral ModulesYesNo
Max. Number of Modules / Power Outputs (Channels)3 / 62 / 2
MCU ModuleSTM32F7 MCU BoardArduino Shield r5B12
Power ModuleDCP405 power module or DCM220 dual power modulePower Board r5B12
OVP (Over-Voltage Protection)HW, fused (DCP405 only) / SWSW
Reverse Power Output ProtectionHigh power diode, fused (DCP405 only)TVS, not fused
No. of Power Relays for Output Couplings4 (Series, parallel, and split rail for first two modules; ground coupling for all modules)2 (Outputs in series and parallel)
Digital/Trigger Inputs21
Digital Outputs21
MCUSTM32F769IGT6Arduino Due
Flash Memory2 MB512 KB
Modules with On-Board EEPROM (for storing module specific params)YesNo
TFT Display4.3”3.2”
Rotary EncoderYes (Ø31 mm knob)Yes (Ø16 mm knob)
User Defined SwitchYesNo
Power Module CommunicationDedicated SPIShared SPI
Memory CardMicroSD (accessible from the front panel)SD (on the back of the TFT display)
Dedicated Fan ControllerYes, up to 2 fansNo
FanØ80 mm, 3- or 4-wireØ60 mm, 3-wire
Multi-Threaded FirmwareYesNo
Programmable Output ListsYes, low jitterYes
Synchronized OEYesNo
AC Input RangeFull range (115 / 230 V)115 / 230 V (manually switchable)
Dimensions290 (W) x 123 (H) x 240 (D) mm290 (W) x 84 (H) x 238 (D) mm

BB3’s modularity is further enhanced by the DIB (DIY Instrumentation Bus) specification, which will allow us to offer additional categories of Testing and Measurement (T&M) modules in the future. To begin with, the upcoming BB3 campaign will give you the option to choose between three different DIB compliant DC power modules. That’s up to six channels in a single box! Finally, we remain committed to a fully open source design, so all of our project files are available (and will be kept up-to-date) on our GitHub repository.

Thank you once again for all of your support and patience. We look forward to seeing you over on the BB3 campaign page very soon!


Denis & the Crowd Supply team

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